I would like a butt full of botox, please

Not because my already-lovely butt needs any beautificiation, but because my goddamn piriformis muscle (particularly on the right hand side) has been giving me holy hell lately. Despite my faithful (and exceedingly awkward) efforts at stretching, my copious ingestion of NSAID pain-relievers, and as much deep-tissue massage work as I can afford/stand to get, [...]